Process control instrument



FIG. 1 is a front, top and right side perspective view of a process control instrument showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof; and,

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a partial view of the bottom thereof showing another pattern for the holes therein, all other portions of this view are identical to those shown in FIG. 6. 

The ornamental design for a process control instrument, as shown and described. 